Two Doppler-free multiphoton schemes achieve microsecond coherent control of the 88Sr 1S0–3P0 clock transition on 3e6 free-space thermal atoms, suppressing Doppler dephasing 1000-fold versus single-photon excitation.
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State-selective (2+1) REMPI produces single H2+ ions in targeted rovibrational states with 85(6)% success for (v+=0, L+=1) confirmed by QLS, plus stable loading of (v+=0, L+=2) with no observed decay over 19 hours.
Four barriers (selection rules, HFS-E2 background, second-order mixing, tensor polarizability) limit gravitomagnetic searches; generalized King plots with three transitions and sufficient odd isotopes can separate them, yielding |χ-1| ≲ 10^8-10^9 for Mo.
citing papers explorer
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Microsecond-Scale Coherent Control of a Forbidden Clock Transition with Doppler-Free Multiphoton Excitations
Two Doppler-free multiphoton schemes achieve microsecond coherent control of the 88Sr 1S0–3P0 clock transition on 3e6 free-space thermal atoms, suppressing Doppler dephasing 1000-fold versus single-photon excitation.
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State-Selective Ionization and Trapping of Single H$_2^+$ Ions with (2+1) Multiphoton Ionization
State-selective (2+1) REMPI produces single H2+ ions in targeted rovibrational states with 85(6)% success for (v+=0, L+=1) confirmed by QLS, plus stable loading of (v+=0, L+=2) with no observed decay over 19 hours.
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Rank-2 Electromagnetic Backgrounds and Angular Momentum Barriers in Gravitomagnetic Spin-Quadrupole Searches
Four barriers (selection rules, HFS-E2 background, second-order mixing, tensor polarizability) limit gravitomagnetic searches; generalized King plots with three transitions and sufficient odd isotopes can separate them, yielding |χ-1| ≲ 10^8-10^9 for Mo.